01 - Preheat oven to 425°F. Line a large baking sheet with parchment paper.
02 - Remove any damaged outer leaves from the cabbage. Slice from top through stem into 1-inch thick steaks.
03 - Arrange cabbage steaks in a single layer on the prepared baking sheet, ensuring pieces do not overlap.
04 - Brush both sides of each cabbage steak generously with olive oil using a pastry brush.
05 - Sprinkle evenly with kosher salt, black pepper, garlic powder, and smoked paprika.
06 - Roast for 25–30 minutes, flipping halfway through, until golden brown and crispy on edges while tender inside.
07 - Transfer to a serving platter. Garnish with chopped parsley and accompany with lemon wedges if desired.